the solubility of sodium nitrate at 20 degree and 30 degree C is 88 and 95 respectively . What amount of sodium nitrate will crystallize out if 130gram saturated solution is cooled from 30 degree to 20 degree C ? Ans : 4.67 g
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Explanation:
100g of water will dissolve 114g of sodium nitrate at 50 degree celsius and 86 g at 30 degree celsius.
1 g of water will dissolve 1.14 g of sodium nitrate at 50 degree celsius and 0.86 g at 30 degree celsius.50 g of water will dissolve 1.14×50=57 g of sodium nitrate at 50 degree celsius and 0.86×50=43 g at 30 degree celsius.
Separation of sodium nitrate out of saturated solution is due to decrease in solubility of sodium nitrate in water with decrease in temperature.
Weight that will separate out from 50 g of water =57−43g=14 g.
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Answer : 4.67 gram
Explanation:
30°30° c hai 88 degree 95 respective
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